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| 41. | The original current set up by the radio waves is very feeble. |
| 无线电波产生的初始电流很弱。 |
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| 42. | a radio wave that is reflected back to earth by the ionosphere or a communications satellite; permits transmission around the curve of the earth's surface. |
| 通过电离层或通信卫星反射回地球的无线电波；通过这种方式能够传输过地球表面的弯曲部分。 |
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| 43. | Permeable to electromagnetic radiation of specified frequencies, as to visible light or radio waves. |
| 可透过的可以让某些频率的电磁辐射通过的，如可见光或无线电波 |
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| 44. | a radio wave propagated on or near the earth's surface. |
| 沿地球表面传播的无线电波。 |
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| 45. | In order to transmit an event such as the Olympics via satellite, television signals are first changed into radio waves, which are then sent from a station on earth to an orbiting satellite. |
| 为了通过卫星传送像奥运会这样的事件，先要把电视信号变成无线电波，然后把无线电波从地面站发射到轨道卫星上。 |
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| 46. | electromagnetic waves,eg X-rays,radio-waves,light waves |
| 电磁波（如X 射线、无线电波、光波）. |
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| 47. | Last, the Radio Plasma Imager sends out pulses of radio waves that bounce off clouds of charged particles. |
| 最后，无线电波电浆摄影机可以发出无线电波脉冲，碰到带电粒子云就反弹回来。 |
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| 48. | Following a radio beam.Used of aircraft. |
| 跟随无线电波。用于指飞机 |
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| 49. | As they were both amateur radio enthusiasts they were able to keep in daily touch(with each other) over the air. |
| 因为他们两个都是无线电的业余爱好者，所以每天都能通过无线电波与对方保持联系。 |
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| 50. | kilometric wave |
| 波长为1000~10000米的无线电波 |
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